When looking for symbols in the "main" module we must search both the main

When looking for symbols in the "main" module we must search both the main

2000-03-23  Tor Lillqvist  <tml@iki.fi>

* gmodule-win32.c (_g_module_symbol): When looking for symbols in
the "main" module we must search both the main program and all
currently loaded DLLs. Not only the main program, or even just the
DLLs loaded as gmodules.  Libglade requires this.

Thus we need to get a list of all modules in the current
process. There are two alternative APIs to do this: PSAPI and
Toolhelp. The former is only available on NT (including Win2k),
the latter on Win9x and Win2k. Check which one works, and use
that.

Code for using PSAPI and Toolhelp was borrowed from the Dr. Mingw
tool written by José Fonseca <em96115@fe.up.pt>. Thanks.